How do I simpllify 1-sin^2x/1-cos^2x?

This one is real easy

1 - sin^2 = cos^2x and
1 - cos^2x = sin^2x

so your expression
= cos^2x/sin^2x
= cot^2 x

Oh wow that is simple. Thank you so much for your help.

To simplify the expression (1 - sin^2x) / (1 - cos^2x), we can start by using the trigonometric identity:

sin^2x + cos^2x = 1

Rewriting the expression in terms of this identity:

(1 - sin^2x) / (1 - cos^2x) = (cos^2x) / (sin^2x)

Now, remembering the reciprocal relationship between sine and cosine:

sin^2x = 1 - cos^2x

We substitute this into our expression:

(cos^2x) / (sin^2x) = (cos^2x) / (1 - cos^2x)

This is the simplified form of the original expression.